| 词条 | Protitanotherium |
| 释义 |
|name = Protitanotherium |fossil_range = {{Fossil range|Eocene}} | image = Titanothere Osborn.jpg | image_width = 250px | image_caption = Protitanotherium, second from the top |regnum = Animalia |phylum = Chordata |classis = Mammalia |ordo = Perissodactyla |familia = Brontotheriidae |subfamilia = Brontopinae |genus = Protitanotherium | genus_authority = Gregory (1912) }}Protitanotherium emarginatum is a brontothere endemic to North America during the Eocene living from 46.2—33.9 mya, existing for approximately {{Mya|46.2-33.9|million years}}.[1] TaxonomyProtitanotherium was named by Osborn (1929) [name suggested by Hatcher 1895; raised to genus level]. It is not extant. It was synonymized subjectively with Diplacodon by Lucas (1983). It was assigned to Brontotheriidae by Osborn (1929), Carroll (1988) and Mader (1989).[2]MorphologyA single specimen was examined by M. Mendoza for body mass and estimated to have a weight of {{Convert|238|kg|lb|abbr=on|sigfig=2}}.[3] References1. ^PaleoBiology Database: Brontopinae, basic info {{Brontotheriidae}}{{Taxonbar|from=Q3924265}}{{paleo-oddtoedungulate-stub}}2. ^B. J. Mader. 1989. In D. R. Prothero and R. M. Schoch (eds.), The Evolution of Perissodactyls 3. ^M. Mendoza, C. M. Janis, and P. Palmqvist. 2006. Estimating the body mass of extinct ungulates: a study on the use of multiple regression. Journal of Zoology 270(1):90-101 5 : Brontotheres|Eocene odd-toed ungulates|Priabonian genus extinctions|Eocene mammals of Asia|Fossil taxa described in 1912 |
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